A floating leaf oscillates up and down two complete cycles in 1 s as a water wave passes by. The wave's wavelength is 10 m. What is the wave's speed?
A)2 m/s
B)10 m/s
C)20 m/s
D)40 m/s
E)more than 40 m/s

Question

Quizplus · Accepted Answer

The frequency of the wave is 2 Hz (since it completes 2 cycles per second). The wave speed is calculated by multiplying the frequency by the wavelength: speed = frequency × wavelength = 2 Hz × 10 m = 20 m/s.

A Floating Leaf Oscillates Up and Down Two Complete Cycles